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LT3080EST#PBF

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仕様・特性

LT3080 Adjustable1.1A Single Resistor Low Dropout Regulator Description Features Outputs May be Paralleled for Higher Current and Heat Spreading n Output Current: 1.1A n Single Resistor Programs Output Voltage n 1% Initial Accuracy of SET Pin Current n Output Adjustable to 0V n Low Output Noise: 40µV RMS (10Hz to 100kHz) n Wide Input Voltage Range: 1.2V to 36V n Low Dropout Voltage: 350mV (Except SOT-223 Package) n <1mV Load Regulation n <0.001%/V Line Regulation n Minimum Load Current: 0.5mA n Stable with 2.2µF Minimum Ceramic Output Capacitor n Current Limit with Foldback and Overtemperature Protected n Available in 8-Lead MSOP 3mm × 3mm DFN, , 5-Lead DD-Pak, TO-220 and 3-Lead SOT-223 n Applications n n n n n High Current All Surface Mount Supply High Efficiency Linear Regulator Post Regulator for Switching Supplies Low Parts Count Variable Voltage Supply Low Output Voltage Power Supplies The LT®3080 is a 1.1A low dropout linear regulator that can be paralleled to increase output current or spread heat in surface mounted boards. Architected as a precision current source and voltage follower allows this new regulator to be used in many applications requiring high current, adjustability to zero, and no heat sink. Also the device brings out the collector of the pass transistor to allow low dropout operation —down to 350 millivolts— when used with multiple supplies. A key feature of the LT3080 is the capability to supply a wide output voltage range. By using a reference current through a single resistor, the output voltage is programmed to any level between zero and 36V. The LT3080 is stable with 2.2µF of capacitance on the output, and the IC uses small ceramic capacitors that do not require additional ESR as is common with other regulators. Internal protection circuitry includes current limiting and thermal limiting. The LT3080 regulator is offered in the 8-lead MSOP (with an exposed pad for better thermal characteristics), a 3mm × 3mm DFN, 5-lead DD-Pak, TO-220 and a simple-to-use 3-lead SOT-223 version. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and VLDO and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical Application Set Pin Current Distribution Variable Output Voltage 1.1A Supply LT3080 IN VIN 1.2V TO 36V N = 13792 VCONTROL + – 1µF OUT SET RSET VOUT = RSET • 10µA 3080 TA01a VOUT 2.2µF 9.80 10.00 10.20 9.90 10.10 SET PIN CURRENT DISTRIBUTION (µA) 3080 G02 3080fc 1

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LINEARTECHNOLOGY

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